#include "stdio.h"
#include "time.h"
#include "unistd.h"
int main() {
  struct tm ts_start, ts_end;
  /*   */
  time(&ts_start);
  // write(1, "Hello, World!\n", 14);
  // mktime(&ts_end);
  time_t ttstart, ttend;
  ttstart = mktime(&ts_start);

  printf("Time taken: %f\n", difftime(ts_end, ts_start));
  return 0;
}
